Interlocking Settlement Induced by Widening Subgrade of Railway Line

In areas where it is difficult to secure additional land for railways, a plan to increase rail transport capacity by widening existing embankments is required. When widening the embankment, additional stress is generated at the bottom of the existing embankment, resulting in an additional settlement...

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Bibliographic Details
Published in:Applied sciences 2022-07, Vol.12 (13), p.6638
Main Authors: Kim, Dae Sang, Kim, Ungjin, Park, Young Kon
Format: Article
Language:English
Subjects:
Backfill
Construction
Embankment stability
Embankments
field test
interlocking settlement
Locking
Locomotives
long-term measurement
railway subgrade
Railway tracks
Settlements & damages
Subgrades
Widening
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Summary:In areas where it is difficult to secure additional land for railways, a plan to increase rail transport capacity by widening existing embankments is required. When widening the embankment, additional stress is generated at the bottom of the existing embankment, resulting in an additional settlement (interlocking settlement) of the existing embankment. Reinforced subgrade for railways (RSR) is an efficient method for widening embankments without additional sites. In this study, an existing railway embankment in operation was widened using the RSR, with the interlocking settlement evaluated and analyzed during and after construction. Results show that a widened embankment using RSR can secure train operation stability on existing tracks, even in ground conditions including shallow soft layers. The interlocking settlement was mainly affected by the backfill load and hardly affected by the wall load of the RSR. In addition, it was confirmed that the interlocking settlement mainly occurred in the backfill construction and stabilization period of RSR construction and converged early.
ISSN:2076-3417
2076-3417
DOI:10.3390/app12136638